Number of (n+1) X 3 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

A186932

Number of (n+1) X 3 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

Terms

    a(0) =24a(1) =104a(2) =472a(3) =1664a(4) =6848a(5) =27272a(6) =108128a(7) =431656a(8) =1719312a(9) =6845968a(10) =27282352a(11) =108671048a(12) =432902384a(13) =1724605424a(14) =6870205712a(15) =27368517688a(16) =109028322640a(17) =434332786176

External references